Accommodation and Comfort in Head-Mounted Displays
Accommodation and Comfort in Head-Mounted Displays
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DOI：
10.1145/3072959.3073622
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发表时间：
2017-07-01
影响因子：
6.2
通讯作者：
Drettakis, George
中科院分区：
文献类型：
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作者：
Koulieris, George-Alex;Bui, Bee;Drettakis, George
头戴式显示器（HMD）通常会引起不适甚至恶心。因此，提高舒适性是设计此类系统的最重要挑战之一。在本文中，我们评估了不同的HMD显示器配置对不适的影响。我们通过设计一种设备来测量人类的视觉行为并评估观众的舒适度来做到这一点。特别是，我们专注于一个已知的不适来源：聚散调节（VA）冲突。VA冲突是指清晰反应和聚散反应之间的差异。在HMD中，眼睛适应固定的屏幕距离，同时它们会聚到感兴趣对象的模拟距离，要求观看者取消两个反应之间的神经耦合。已经提出了几种方法来缓解VA冲突，包括景深（DoF）渲染，焦点可调镜头和monovision。然而，没有以前的工作已经调查是否这些解决方案实际上驱动调节到模拟对象的距离。如果他们这样做了，退伍军人事务部的冲突就会消失，我们希望舒适度得到改善。我们设计了第一个允许我们测量HMD调节的设备，我们用它来获得调节测量值并进行不适研究。第一个实验的结果表明，只有焦点可调透镜设计有效地驱动调节，而其他解决方案不驱动调节到模拟距离，因此不解决VA冲突。第二个实验测量不适感。结果验证了焦点可调透镜设计比其他解决方案显著提高了舒适度。
Head-mounted displays (HMDs) often cause discomfort and even nausea. Improving comfort is therefore one of the most significant challenges for the design of such systems. In this paper, we evaluate the effect of different HMD display configurations on discomfort. We do this by designing a device to measure human visual behavior and evaluate viewer comfort. In particular, we focus on one known source of discomfort: the vergence-accommodation (VA) conflict. The VA conflict is the difference between accommodative and vergence response. In HMDs the eyes accommodate to a fixed screen distance while they converge to the simulated distance of the object of interest, requiring the viewer to undo the neural coupling between the two responses. Several methods have been proposed to alleviate the VA conflict, including Depth-of-Field (DoF) rendering, focus-adjustable lenses, and monovision. However, no previous work has investigated whether these solutions actually drive accommodation to the distance of the simulated object. If they did, the VA conflict would disappear, and we expect comfort to improve. We design the first device that allows us to measure accommodation in HMDs, and we use it to obtain accommodation measurements and to conduct a discomfort study. The results of the first experiment demonstrate that only the focus-adjustable-lens design drives accommodation effectively, while other solutions do not drive accommodation to the simulated distance and thus do not resolve the VA conflict. The second experiment measures discomfort. The results validate that the focus-adjustable-lens design improves comfort significantly more than the other solutions.